Grinding rod of numerical control internal grinding machine

Abstract

The utility model relates to the technical field of numerical control grinding rods, and discloses a numerical control internal grinding machine grinding rod which comprises a shell which is a hollow cylinder. The grinding rod is arranged in the shell, and the grinding rod is connected with the shell through a fastener; the grinding head is arranged at one end of the grinding rod, one end of the grinding rod is in threaded connection with a fixing block, and the fixing block is used for tightening one end of the grinding rod; the buffering assembly is arranged in the shell, the buffering assembly is used for buffering the grinding rod, the buffering assembly comprises an elastic part and a limiting shell, when the grinding head is impacted, the shell is driven to move inwards, the shell pushes the inner limiting shell to move, the elastic part is extruded through the limiting shell, and the elastic part deforms; and the applied force is absorbed and buffered, so that the vast majority of impact force is quickly absorbed through deformation, the rigidity precision of a machine tool is indirectly protected, and more importantly, the electric spindle can be protected from being subjected to impact force and causing faults.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerically controlled grinding rods, and specifically relates to a grinding rod for a numerically controlled internal grinding machine. Background Art

[0002] A milling machine mainly refers to a machine tool for machining various surfaces of a workpiece with a milling cutter. Usually, the milling cutter takes the rotary motion as the main motion, and the movement of the workpiece and the milling cutter is the feed motion. It can machine planes, grooves, and can also machine various curved surfaces, gears, etc. A milling machine is a machine tool for milling the workpiece with a milling cutter. In addition to milling planes, grooves, gear teeth, threads, and spline shafts, a milling machine can also machine relatively complex profiles, with higher efficiency than a planer, and is widely used in the machinery manufacturing and repair departments. After the parts are machined on the milling machine, they need to be transferred to a coordinate grinding machine for grinding. However, during the positioning process, positioning errors are likely to occur, which is not conducive to the precision machining of the parts.

[0003] After retrieval, a document with the publication number (CN219426527U) discloses a grinding head for a numerically controlled milling machine, including a grinding head mounting rod and a grinding head body. A connecting head is fixedly provided at the bottom end of the grinding head mounting rod, and a connecting sleeve is fixedly provided at the top of the grinding head body. Locking screws can lock and fix the solid rod, and the solid rod can be pulled out by loosening the locking screws.

[0004] Through the above device by setting the locking screws, the locking screws can lock and fix the solid rod. By loosening the locking screws and pulling out the solid rod, the length of the grinding head mounting rod can be adjusted. After the length adjustment of the grinding head mounting rod is completed, the locking screws can be rotated to lock, which can meet different usage requirements.

[0005] However, when an internal grinding machine grinds an internal hole, it is divided into a main motion, an axial reciprocating motion, and a radial feed motion. The main motion is mainly driven by a high-speed electric spindle to drive the grinding wheel to rotate. The connection and transmission between the grinding wheel and the electric spindle are mainly carried out by a grinding rod. Since the high-speed electric spindle is expensive, has high precision, and is difficult to repair, it generally needs to be sent abroad for disassembly and repair in a dust-free laboratory, with high costs. Although it can also be repaired in China, the precision after repair cannot meet the processing precision requirements of the produced parts. Therefore, it has become a problem that must be solved to study how to protect the electric spindle.

[0006] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0007] To solve the technical problem that the grinding rod does not have buffering ability, the basic concept of the technical solution adopted by the present utility model is:

[0008] A grinding rod for a numerically controlled internal grinding machine, comprising a housing which is a hollow cylinder; a grinding rod disposed within the housing, the grinding rod being connected to the housing by a fastener; a grinding head disposed at one end of the grinding rod, one end of the grinding rod being threadedly connected with a fixing block for tightening one end of the grinding rod; a buffer assembly disposed within the housing for buffering the grinding rod.

[0009] As a preferred embodiment of the present utility model, a positioning rod is provided at the other end of the grinding rod, a cavity is formed inside the grinding rod, and a grinding core is fixedly installed within the cavity.

[0010] As a preferred embodiment of the present utility model, the buffer assembly includes an elastic member and a limiting shell. The elastic member is sleeved on the positioning rod, both ends of the elastic member are fixedly connected to the limiting shell, the limiting shell is slidably connected to the positioning rod, and the limiting shell is movably connected to the interior of the housing. The elastic member includes but is not limited to a spring.

[0011] As a preferred embodiment of the present utility model, the other end of the positioning rod is fixedly connected to a transmission rod, and connection blocks are provided at both ends of the housing. The two connection blocks are threadedly connected to the grinding rod and the transmission rod respectively.

[0012] As a preferred embodiment of the present utility model, a spring pad is installed between the connection block and the housing.

[0013] As a preferred embodiment of the present utility model, bearings are fixedly connected to both the grinding rod and the transmission rod, and the bearings are fixedly connected to the inner wall of the housing.

[0014] As a preferred embodiment of the present utility model, the other end of the transmission rod is fixedly connected to an abutting block, and the abutting block is connected to a motor by a fastener and fixedly connected to the output shaft.

[0015] As a preferred embodiment of the present utility model, the size of the positioning rod is larger than that of the grinding rod and the transmission rod.

[0016] The present utility model has the following beneficial effects compared with the prior art:

[0017] 1. For this grinding rod of the numerically controlled internal grinding machine, when the grinding head is impacted, it drives the housing to move inward. The housing pushes the internal limiting shell to move accordingly. By squeezing the elastic member with the limiting shell, the elastic member deforms and absorbs the applied force for buffering. Thus, most of the impact force is quickly absorbed through deformation, indirectly protecting the rigidity accuracy of the machine tool. More importantly, it can protect the electric spindle from being damaged by the impact force and causing malfunctions.

[0018] 2. The grinding rod of this numerically controlled internal grinding machine, during the rotation of the grinding rod, through the grinding core, and the grinding core selects a high-density low-temperature alloy to increase the density of the inner core of the grinding rod. When the grinding rod rotates, the moment of inertia is greater than that of the original grinding rod; it is more stable when rotating than an ordinary grinding rod. At the same time, it is fixedly supported by the bearings on the grinding rod and the transmission rod and the inner wall of the housing, thereby avoiding the shaking during the rotation caused by the excessive overall length of the grinding rod, the positioning rod, and the transmission rod, and making the rotation of the grinding rod more stable.

[0019] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings:

[0021] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0022] Figure 2 is a sectional schematic diagram of the present invention;

[0023] Figure 3 is a schematic diagram of the structure between the limit shell and the grinding rod of the present invention;

[0024] Figure 4 is a schematic diagram of the structure on the positioning rod of the present invention;

[0025] Figure 5 is a schematic diagram of the structure on the grinding rod of the present invention.

[0026] In the figure: 1, housing; 2, grinding rod; 21, grinding core; 22, positioning rod; 3, grinding head; 31, fixing block; 4, transmission rod; 41, abutting block; 5, bearing; 6, elastic member; 61, limit shell. SPECIFIC IMPLEMENTATION MANNERS

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0028] Please refer to Figures 1-5, A grinding rod for a numerically controlled internal cylindrical grinder, comprising a housing 1, the housing 1 being a hollow cylinder; a grinding rod 2, the grinding rod 2 being arranged inside the housing 1, the grinding rod 2 being connected to the housing 1 by fasteners, the fasteners including but not limited to bolts; a grinding head 3, the grinding head 3 being arranged at one end of the grinding rod 2, one end of the grinding rod 2 being connected by a thread to a fixing block 31, the fixing block 31 being used to tighten one end of the grinding rod 2; a buffer assembly, the buffer assembly being arranged inside the housing 1, the buffer assembly being used to buffer the grinding rod 2, the buffer assembly including an elastic member 6 and a limiting shell 61, the elastic member 6 being sleeved on a positioning rod 22, both ends of the elastic member 6 being fixedly connected to the limiting shell 61, the limiting shell 61 being slidably connected to the positioning rod 22, the limiting shell 61 being movably connected to the inside of the housing 1, the elastic member 6 including but not limited to a spring. By manually pushing the grinding head 3 into the grinding rod 2, at this time, the fixing block 31 is tightened, and the grinding rod 2 is tightened by the fixing block 31 to fix the grinding head 3. When the grinding head 3 is impacted, it drives the housing 1 to move inward, the housing 1 pushes the internal limiting shell 61 to move along, the elastic member 6 is compressed by the limiting shell 61, the elastic member 6 deforms, and absorbs and buffers the force received, so as to quickly absorb most of the impact force through deformation, thereby indirectly protecting the rigidity accuracy of the machine tool. More importantly, it can protect the electric spindle from being damaged by the impact force and causing failures.

[0029] Among them, the other end of the grinding rod 2 is provided with a positioning rod 22, a cavity is opened inside the grinding rod 2, a grinding core 21 is fixedly installed in the cavity, the other end of the positioning rod 22 is fixedly connected to a transmission rod 4, connection blocks are arranged at both ends of the housing 1, and the two connection blocks are respectively connected to the grinding rod 2 and the transmission rod 4 by threads. A spring pad is installed between the connection block and the housing 1. Bearings 5 are fixedly connected to both the grinding rod 2 and the transmission rod 4, and the bearings 5 are fixedly connected to the inner wall of the housing 1. The other end of the transmission rod 4 is fixedly connected to an abutting block 41, the abutting block 41 is connected to a motor by fasteners and is fixedly connected to the output shaft, the fasteners including but not limited to bolts. The size of the positioning rod 22 is larger than that of the grinding rod 2 and the transmission rod 4. At the same time, during the rotation of the grinding rod 2, through the grinding core 21, the grinding core 21 is selected as a high-density low-temperature alloy to increase the density of the inner core part of the grinding rod 2. When the grinding rod rotates, the moment of inertia is greater than that of the original grinding rod; it is more stable when rotating than an ordinary grinding rod. At the same time, through the bearings 5 on the grinding rod 2 and the transmission rod 4 being fixedly supported by the inner wall of the housing 1, it is avoided that the overall length of the grinding rod 2, the positioning rod 22 and the transmission rod 4 is too long and causes shaking during the rotation process, so that the rotation of the grinding rod 2 is more stable.

[0030] Working principle: Manually insert the grinding head 3 into the grinding rod 2. At this time, tighten the fixing block 31. By tightening the fixing block 31, the grinding rod 2 is tightened to fix the grinding head 3. When the grinding head 3 is impacted, it drives the outer shell 1 to move inward. The outer shell 1 pushes the internal limit shell 61 to move along. The limit shell 61 squeezes the elastic member 6. The elastic member 6 deforms and absorbs and buffers the received force. Thus, most of the impact force is quickly absorbed through deformation, indirectly protecting the rigidity accuracy of the machine tool. More importantly, it can protect the motorized spindle from being damaged by the impact force and causing failures. At the same time, during the rotation of the grinding rod 2, through the grinding core 21, the grinding core 21 is made of high-density low-temperature alloy to increase the density of the inner core of the grinding rod 2. When the grinding rod rotates, the moment of inertia is greater than that of the original grinding rod; it is more stable when rotating than the ordinary grinding rod. At the same time, through the bearings 5 on the grinding rod 2 and the transmission rod 4, they are fixedly supported on the inner wall of the outer shell 1, thus avoiding the overall length of the grinding rod 2, the positioning rod 22 and the transmission rod 4 being too long and causing shaking during the rotation process, making the rotation of the grinding rod 2 more stable.

[0031] It can be understood that the present utility model is described by some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A CNC internal grinding machine for grinding rods, characterized in that: include; The outer shell (1) is a hollow cylinder; A grinding rod (2), the grinding rod (2) is arranged in the housing (1), and the grinding rod (2) is connected to the housing (1) via a fastener; A grinding head (3), the grinding head (3) is arranged at one end of a grinding rod (2), one end of the grinding rod (2) is connected to a fixing block (31) via a thread, and the fixing block (31) is used to tighten one end of the grinding rod (2); A buffer component is arranged in the housing (1) and is used to buffer the grinding rod (2).

2. The CNC internal grinding machine rod grinding machine according to claim 1, characterized in that: A positioning rod (22) is provided at the other end of the grinding rod (2), and a cavity is provided inside the grinding rod (2), in which a grinding core (21) is fixedly installed.

3. The CNC internal grinding machine rod grinding machine according to claim 1, characterized in that: The buffer assembly comprises an elastic member (6) and a limiting shell (61); the elastic member (6) is sleeved on the positioning rod (22); both ends of the elastic member (6) are fixedly connected to the limiting shell (61); the limiting shell (61) is slidably connected to the positioning rod (22); the limiting shell (61) is movably connected to the inside of the outer shell (1); and the elastic member (6) comprises but is not limited to a spring.

4. The CNC internal grinding machine rod grinding machine according to claim 2, characterized in that: The other end of the positioning rod (22) is fixedly connected to the transmission rod (4), and both ends of the housing (1) are provided with connecting blocks, and the two connecting blocks are respectively connected to the grinding rod (2) and the transmission rod (4) through threads.

5. The CNC internal grinding machine rod grinding machine according to claim 4, characterized in that: A spring pad is installed between the connecting block and the housing (1).

6. The rod grinding machine of the CNC internal cylindrical grinder according to claim 4, characterized in that: The grinding rod (2) and the transmission rod (4) are both fixedly connected with bearings (5), and the bearings (5) are fixedly connected to the inner wall of the outer shell (1).

7. The rod grinding machine of the CNC internal cylindrical grinder according to claim 4, characterized in that: The other end of the transmission rod (4) is fixedly connected to an abutment block (41), and the abutment block (41) is connected to a motor via a fastener and is fixedly connected to the output shaft.

8. The rod grinding machine of the CNC internal cylindrical grinder according to claim 4, characterized in that: The size of the positioning rod (22) is larger than the grinding rod (2) and the transmission rod (4).

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